Abstract In this paper, the formation of β-Si3N4 3D self-assemblies via combustion of Si-(C2F4)n-KClO4 solid mixture in nitrogen atmosphere is demonstrated. The coupling of (C2F4)n and KClO4 additives with Si powder stimulates the combustion-nitridation process and leads to the formation and 3D self-assemblies composed of β-Si3N4 prismatic crystals. The self-assemblies are classified as sheet-type, circular-type, castle-type geometry objects, high symmetry multipods and ‘crystals bouquets’ having a central junction. The formation of 3D self-assemblies is based on prismatic crystals twining process and among twinned structures, penetration, contact and circular twins were distinguished. Based on SEM and TEM results a scheme showing the growth process of self-assemblies is proposed.

中文翻译：

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β-Si3N4 的 3D 自组装：合成、表征和生长机制

摘要 本文论证了Si-(C2F4)n-KClO4 固体混合物在氮气氛中燃烧形成β-Si3N4 3D 自组装体。(C2F4)n 和 KClO4 添加剂与 Si 粉末的耦合刺激了燃烧氮化过程，并导致形成和 3D 自组装由 β-Si3N4 棱柱晶体组成。自组装体分为片状、圆形、城堡型几何物体、高度对称的多脚架和具有中心连接点的“水晶花束”。3D自组装的形成基于棱柱晶体的孪晶过程，孪晶结构中区分了穿透、接触和圆形孪晶。基于SEM和TEM结果，提出了显示自组装体生长过程的方案。